Health or ancestry? How to choose the right genetic test for you

Every so often, someone asks me which [genetics] test I recommend. And my answer boils down to one question: What do you want to get out of the test? Let's compare three direct-to-consumer tests: AncestryDNA, 23andMe, and National Geographic's Geno 2.0 test.

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If you're looking at this test as a science experiment, using it as a way to get involved in research, or viewing it as a chance to learn about your genetic health risks, then [23andMe’s test] is a fit for you.

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If the idea of tracing your family tree through the generations and connecting with distant relatives gets you excited — but you're less interested in health information — [AncestryDNA is] the test for you.

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For what you get, the [Geno 2.0] doesn't have nearly the range that other ancestry tests have. And when not on sale, it's more expensive. National Geographic, however, says the revenue funds nonprofit "conservation, exploration, research, and education" efforts.

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Each company has its own methods, algorithms, and data, which is why the reports differ. Because the three main direct-to-consumer genetics tests are around the same price, you should go with the one that will answer your most pressing questions.